/Engine/Source/Editor/PropertyEditor/Public/PropertyCustomizationHelpers.h
Loops through all of an instanced object property's child properties and call AddRowDelegate on properties that needs to be added to the UI to let us customize it.
namespace PropertyCustomizationHelpers { void PropertyCustomizationHelpers::MakeInstancedPropertyCustomUI ( [TMap](API\Runtime\Core\Containers\TMap)< [FName](API\Runtime\Core\UObject\FName), [IDetailGroup](API\Editor\PropertyEditor\IDetailGroup) * > & ExistingGroup, [IDetailCategoryBuilder](API\Editor\PropertyEditor\IDetailCategoryBuilder) & BaseCategory, [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IPropertyHandle](API\Editor\PropertyEditor\IPropertyHandle) > & BaseProperty, FOnInstancedPropertyIteration AddRowDelegate ) }